Mark bifrost as buildable and build containers from correct tarballs

Mark bifrost as buildable since [1] is merged and new tarball
is posted [2]. Also this change fixes an issue that containers were
built from old tarballs still exist on [3].

[1]: https://review.opendev.org/c/openstack/bifrost/+/909844
[2]: https://tarballs.opendev.org/openstack/bifrost/
[3]: https://tarballs.opendev.org/openstack/

Change-Id: I7b491f54d78398dadf080532aef694301e0bbe7b
Signed-off-by: Maksim Malchuk <maksim.malchuk@gmail.com>

kolla/common/config.py

@@ -1038,7 +1038,7 @@ def parse(conf, args, usage=None, prog=None,
     # NOTE(jeffrey4l): set the default base tag based on the
     # base option
     conf.set_default('base_tag', DEFAULT_BASE_TAGS[conf.base]['tag'])
-    prefix = '' if conf.openstack_release == 'master' else 'stable-'
+    prefix = '' if conf.openstack_release == 'master' else 'unmaintained-'
     openstack_branch = '{}{}'.format(prefix, conf.openstack_release)
     openstack_branch_slashed = openstack_branch.replace('-', '/')
     conf.set_default('openstack_branch', openstack_branch)

kolla/image/build.py

@@ -99,7 +99,6 @@ UNBUILDABLE_IMAGES = {
     },
 
     'source': {
-        "bifrost-base",          # Broken on unmaintained/yoga
     },
 
     'centos': {